I need to get the letter from a word

Question

I tried this code but at the for loop it seems to do nothing.

#include <stdio.h>
#include <stdlib.h>

void main()
{

    char word[100];
    char suf [100];
    int i,j,k = 0;
    char a [100];

    printf("Enter the word: \n");
    gets(word);
    printf("\n");



    for (i = strlen(word); i < 0; i--)
            {
                 a[i] = word[i];
                 printf("%s",a);

            }
}

Example Output:

>> Enter the word: Program

>> m

>> am

>> ram

>> gram

>> ogram

>> rogram

Please read Someone answered my question! What to do now? http://stackoverflow.com/help/someone-answers , and consider accepting one of the answers to your questions — OneMoreError, Aug 05 '14 at 15:27

score 1 · Answer 1 · answered Aug 05 '14 at 15:02

1

Using pointer arithmetic would probably be the easiest way to do this; you won't even need a temporary buffer:

for (i = strlen(word) - 1; i > 0; --i) {
    printf("%s\n", word + i);
}

answered Aug 05 '14 at 15:02

cdhowie

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Thanks man...I got stucked at the last step...didn't know how to manage that thing...thanks a lot! – Daniel D. Vanca Aug 05 '14 at 15:05

OneMoreError · Answer 2 · 2014-08-05T16:34:16.483

ALTERNATIVE : Use a pointer approach :

#include <stdio.h>
#include<string.h>

int main(int argc, const char * argv[])
{
    char word[100];

    printf("Enter the word: \n");
    gets(word);
    printf("\n");
    char *ptr;
    int len = (int)strlen(word) ;

    for (int i = len -1; i > 0; --i)
    {
        ptr = &word[i];
        printf("%s\n",ptr);

    }
    return 0;
}

Explanation :

Say the string you entered is program Now, the index ranges from 0 to 6 here, and not 7. In your code, you are starting with i = strlen(word) which is wrong. You should start with i = strlen(word) -1.

Also, you should decrement till the value of i is greater than 0 - not less as in your case i < 0.

SUGGESTIONS :

Do not use void main(……). Use int main(…). The former may not be supported on all compliers.

I need to get the letter from a word

2 Answers2